[–] stoolpigeon 14y ago ↗ when I can't answer my kid's questions we head to the interwebs and find the answers (or leading theories, etc.) together. we both learn.
[–] timthorn 14y ago ↗ I'm not convinced by 2 of the answers to their 5 question pop quiz:> Q: How much does the Earth weigh? A: 1,000 trillion metric tonnesBut isn't asking the weight (and not mass) of a planet fairly meaningless?> Q: How do aeroplanes stay up? A: The upward lift of a plane is created by its curved wingsIsn't the dominant component due to downward deflection of oncoming air?
2 comments
[ 3.2 ms ] story [ 20.6 ms ] thread> Q: How much does the Earth weigh? A: 1,000 trillion metric tonnes
But isn't asking the weight (and not mass) of a planet fairly meaningless?
> Q: How do aeroplanes stay up? A: The upward lift of a plane is created by its curved wings
Isn't the dominant component due to downward deflection of oncoming air?